body {
    margin-top: 200px;
    display: flex;
    justify-content: space-around;
    align-items: center;
    background-image: url(https://img0.baidu.com/it/u=3035683064,3847745853&fm=26&fmt=auto);
}

.out_div {
    height: 500px;
    width: 400px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: white;
}

.ipt_txt {
    height: 50px;
    width: 400px;
    border-radius: 20px;
    margin-top: 10px;
}

.btn {
    height: 50px;
    width: 370px;
    margin-top: 10px;
    border-radius: 20px;
}

.out_div {
    border-style: dashed;
    border-width: 2px;
    padding: 20px;
    border-radius: 40px;
}

h2 {
    font-style: italic;
}

.nvpy {
    height: 700px;
    width: 400px;
    margin-left: 50px;
    margin-right: -100px;
}

.nanpy {
    height: 700px;
    width: 400px;
}